Fabrication and optical properties of gold nanotube arrays

Abstract

Arrays of gold nanotubes with polypyrrole cores were grown on glass substrates by electrodeposition into thin film porous alumina templates. Measurements of optical transmission revealed strong extinction peaks related to plasmonic resonances, which were sensitive to the polarization state and angle of incidence. On prolonging the electrodeposition of gold, the polypyrrole core became fully encapsulated and this had a dramatic effect on the optical properties of the arrays, which was rationalized by finite element simulation of the local field intensities resulting from plasmon excitation.

Self‐Supporting Metal Nanotube Networks Obtained by Highly Conformal Electroless Plating

“…Colloidal,s hape-controlled NP synthesesa re frequently used to directly produce elongated nanocrystals.H owever,i ti sv ery difficult to independently control the diameter,s hape, composition, andl ength of the products, and hollow morphologies such as NTsu sually cannot be obtained. [16][17][18] In contrast, template-based approaches such as the deposition of NWs [7,19,20] and NTs [5,12,13,15,21] within porous alumina [5,15,20,21] or polymer [7,12,13,19] membranes provideh igh flexibility with regards to product composition and morphology.V arious techniques such as electrodeposition, electroless plating,a nd vapor deposition can be used to metallize templates.…”

Improve the refractive index sensitivity of gold nanotube by reducing the restoring force of localized surface plasmon resonance

“…In this paper, we report a new refractive index sensor based on gold nanotube. Nowadays, arrays of gold nanotubes can be fabricated by electrodeposition into thin film porous alumina templates [18]. These gold nanotubes can act as conduits for molecule and biological matter transport.…”

Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance

“…These syntheses typically leave poorly formed, porous nanotubes or allow for little control over the size and morphology. Syntheses have also been reported wherein a metallic shell is deposited over a polymer core in an AAO membrane 42,43 . From that and subsequent work, it was discovered that in order to deposit gold shells around the polymer core without chemical etching, the polymer must be tubular such that there is interior space for it to collapse, and the polymer must be hydrophobic such that it will collapse onto itself rather than adhere to the template pore walls 16 .…”